Process for the exhaustion of head products in distilling.



N0. 851,286. PATEN'IED APR. 23, 1907.

B. GUILLAUME. PROCESS FOR THE EXHAUSTION OF HEAD PRODUCTS IN DISTILLING.

APPLIOAT ION FILED JAN.21,1899.

2% fae59 into the said still, in order to completely remove from the said liquid, the head products which are retained in the same.-

In the accompanying illustration is shown, more or less diagrammatically, one type of apparatus of the many adapted to' perform t e process of the present invention.

In-the drawing, B represents as a whole the.

primary still of any form adapted to deliver comparatively concentrated and pure alcohol vapors. As shown, it is an ordinary fractionating column still provided at its top with an inlet pipe 1 and distributer D for the liquid to be distilled and at its base an outlet H for. dealcoholized liquid, and a heating steam coil G, fed by valved pipe F. The course of the vapors through the still is shown by arrows 2. The still is provided with the usual cross plates. A-A represent as a whole the secondary still, .here also shown as an ordinary type of column still so far as the internal structure is concerned.

Alcohol vapors from the primary still B are introduced through pipe K into the secondary still at a point here shown as about midway the height of the latter. The particular point however will depend to some extent' upon the average richness of the alcohol vapors which are to be treated. The still is provided with a vapor outlet E leading to a condenser (not shown) of any and wellknown kind. The working of this condenser has for its result to condense completely the vapour of alcohol which arise to the top of the secondary still, while the vapours of-the head products resist and are most difficultly condensed. column is provided with pipe 0 for introducing heating vaporslor steam and outlet 6 for withdrawing the purified alcohol. Arrows 4 show the downward course of the condensate above the alcohol inlet K; arrows 5, its course below that point. Arrows 3 and-7 respectively show the upward course of vapor.

The amount of steam or heating vapors introduced at the base of the secondary still should of course be only that which is required to keep the temperature at that point near but below the boiling point of the alcohol.

The operation of the apparatus is apparent from the foregoing. Beer, wine, whisky, or other alcoholic liquid is introduced into the top of the primary still in the usual manner and flows downward against the ascending vapors, reaching the base of the still free from alcohol, and bodies of low boiling, oint. The rich vapors of alcohol etc., leave t e apparatus and enter the secondary still through K, and pass upwards through the plates above the inlet, alcohol condensing out and head products, that is to say aldehyde and other low boiling bodies volatilizing in its lieu until from the top of the still The bottom chamber of the vapors leave which are rich in these volatile =-impurities and contain comparatively little alcohol. The alcohol passing through the plates below the inlet becomes progressively richer and hotter, losing all its low boiling impurities before the bottom chamber is reached and being drawn 0s thence as pure ethyl alcohol.

3 To recapitulate, my invention consists in igreparing alcohol vapors substantially free om high boiling constituents in an ordinary column still or similarv device; passing these vapors into a secondary still, condensing out the alcohol therefrom and passing onward the vapors of lower boiling bodies for subse-- .quent condensation. What I claim is:

1. The process of preparing alcohol which consists in forming concentrated alcohol vapors, condensing the alcohol by passing such va ors into a column still, in said column sti boiling out the vapors of low-boil- 4 ing head roducts for condensation elsewhere, an removing the purified alcohol from the base of the still.

2. The process of preparing alcohol which consists in fractionating alcoholic liquids to produce concentrated alcoholic va ors, condensing the alcohol by passing t e vapors into a column still, in said column still boiling out the va ors of low boiling head products for condensation elsewhere, using a small and regulated admission of steam for such boiling, and removing the purified alcohol from the base of the still.

3. The process of preparing alcohol which consists in fractionating alcoholic liquids to concentrated alcoholicvapors in a column still, condensing the alcohol. by passing said vapors into a second column still, in said second column still boiling out the vapors of ICC low-boiling head products for condensation elsewhere, and removing the purified alcohol from the base of said second column still.

- 4:- ,The process of preparing alcohol which consists in fractionating alcoholic liquids to concentrated alcoholic vapors in a column still, introducing said vapors intoa second column still at a point about midway its height and therein condensing the alcohol and boiling out vapors of low-boiling head products for; condensation-elsewhere, and removing the purified alcohol from the base of said second still.

5. The process of treating concentrated alcoholic vapors which consists in introducing them into a column still at a point about midway its height, introducing a small but regulated amount of heating vapor into the base of the still in'quantity sufficient to boil out vapors of low-boiling head products from the condensing alcohol, and removing the purified, condensed'alcohol from the base of the still. v

6. The process of treating concentrated ing them into a column still at a point about still.

alcoholic vapors which consists in introducdensed, purified alcohol from the base of the midway its height, introducing a small but In witness whereof I have hereunto set my regulated amount of'steam into the base of hand in presence of two witnesses.

the still in quantity suflicient to boil out EMILE GUILLAUME. vapors of low-boiling head products from the Witnesses: condensing alcohol, removing such vapors EDWARD P. MACLEAN,

from the head of the still and removing con- 5 J ULES FAYOLLET. 

